Haruki collapses after saying goodbye to Kasuza, and Setsuna, who he betrayed, comes to take care of him.  Haruki is too overcome with guilt to move, and Setsuna tries to pretend she knows nothing as she struggles with guilt of her own.
I was so busy, I didn't notice.
Ich war so beschäftigt, ich 
hab nicht drauf geachtet.
Estaba tan ocupado que no me di cuenta.
He estado tan ocupado 
que ni me he dado cuenta.
J’étais trop occupé 
pour m’en apercevoir.
Estava tão ocupado que nem reparei.